Symbol Line Chart

[Ruby On Rails Version - Controller] app/controllers/symbolline_controller.rb

require("chartdirector")

class SymbollineController < ApplicationController

    def index()
        @title = "Symbol Line Chart"
        @ctrl_file = File.expand_path(__FILE__)
        @noOfCharts = 1
        render :template => "templates/chartview"
    end

    #
    # Render and deliver the chart
    #
    def getchart()
        # The data for the line chart
        data0 = [60.2, 51.7, 81.3, 48.6, 56.2, 68.9, 52.8]
        data1 = [30.0, 32.7, 33.9, 29.5, 32.2, 28.4, 29.8]
        labels = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]

        # Create a XYChart object of size 300 x 180 pixels, with a pale yellow (0xffffc0)
        # background, a black border, and 1 pixel 3D border effect.
        c = ChartDirector::XYChart.new(300, 180, 0xffffc0, 0x000000, 1)

        # Set the plotarea at (45, 35) and of size 240 x 120 pixels, with white background. Turn on
        # both horizontal and vertical grid lines with light grey color (0xc0c0c0)
        c.setPlotArea(45, 35, 240, 120, 0xffffff, -1, -1, 0xc0c0c0, -1)

        # Add a legend box at (45, 12) (top of the chart) using horizontal layout and 8pt Arial font
        # Set the background and border color to Transparent.
        c.addLegend(45, 12, false, "", 8).setBackground(ChartDirector::Transparent)

        # Add a title to the chart using 9pt Arial Bold/white font. Use a 1 x 2 bitmap pattern as
        # the background.
        c.addTitle("Server Load (Jun 01 - Jun 07)", "arialbd.ttf", 9, 0xffffff).setBackground(
            c.patternColor([0x004000, 0x008000], 2))

        # Set the y axis label format to nn%
        c.yAxis().setLabelFormat("{value}%")

        # Set the labels on the x axis
        c.xAxis().setLabels(labels)

        # Add a line layer to the chart
        layer = c.addLineLayer()

        # Add the first line. Plot the points with a 7 pixel square symbol
        layer.addDataSet(data0, 0xcf4040, "Peak").setDataSymbol(ChartDirector::SquareSymbol, 7)

        # Add the second line. Plot the points with a 9 pixel dismond symbol
        layer.addDataSet(data1, 0x40cf40, "Average").setDataSymbol(ChartDirector::DiamondSymbol, 9)

        # Enable data label on the data points. Set the label format to nn%.
        layer.setDataLabelFormat("{value|0}%")

        # Output the chart
        send_data(c.makeChart2(ChartDirector::PNG), :type => "image/png", :disposition => "inline")

    end

end

[Ruby On Rails Version - View] app/views/templates/chartview.html.erb

<html>
<body style="margin:5px 0px 0px 5px">

<!-- Title -->
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    <%= @title %>
</div>
<hr style="border:solid 1px #000080" />

<!-- Source Code Listing Link -->
<div style="font-size:9pt; font-family:verdana; margin-bottom:1.5em">
    <%= link_to "Source Code Listing", 
        :controller => "cddemo", :action => "viewsource",
        :ctrl_file => @ctrl_file, :view_file => File.expand_path(__FILE__) %>
</div>

<!-- Create one or more IMG tags to display the demo chart(s) -->
<% 0.upto(@noOfCharts - 1) do |i| %>
    <img src="<%= url_for(:action => "getchart", :img => i) %>">
<% end %>

</body>
</html>

[Command Line Version] rubydemo/symbolline.rb

#!/usr/bin/env ruby
require("chartdirector")

# The data for the line chart
data0 = [60.2, 51.7, 81.3, 48.6, 56.2, 68.9, 52.8]
data1 = [30.0, 32.7, 33.9, 29.5, 32.2, 28.4, 29.8]
labels = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]

# Create a XYChart object of size 300 x 180 pixels, with a pale yellow (0xffffc0) background, a
# black border, and 1 pixel 3D border effect.
c = ChartDirector::XYChart.new(300, 180, 0xffffc0, 0x000000, 1)

# Set the plotarea at (45, 35) and of size 240 x 120 pixels, with white background. Turn on both
# horizontal and vertical grid lines with light grey color (0xc0c0c0)
c.setPlotArea(45, 35, 240, 120, 0xffffff, -1, -1, 0xc0c0c0, -1)

# Add a legend box at (45, 12) (top of the chart) using horizontal layout and 8pt Arial font Set the
# background and border color to Transparent.
c.addLegend(45, 12, false, "", 8).setBackground(ChartDirector::Transparent)

# Add a title to the chart using 9pt Arial Bold/white font. Use a 1 x 2 bitmap pattern as the
# background.
c.addTitle("Server Load (Jun 01 - Jun 07)", "arialbd.ttf", 9, 0xffffff).setBackground(
    c.patternColor([0x004000, 0x008000], 2))

# Set the y axis label format to nn%
c.yAxis().setLabelFormat("{value}%")

# Set the labels on the x axis
c.xAxis().setLabels(labels)

# Add a line layer to the chart
layer = c.addLineLayer()

# Add the first line. Plot the points with a 7 pixel square symbol
layer.addDataSet(data0, 0xcf4040, "Peak").setDataSymbol(ChartDirector::SquareSymbol, 7)

# Add the second line. Plot the points with a 9 pixel dismond symbol
layer.addDataSet(data1, 0x40cf40, "Average").setDataSymbol(ChartDirector::DiamondSymbol, 9)

# Enable data label on the data points. Set the label format to nn%.
layer.setDataLabelFormat("{value|0}%")

# Output the chart
c.makeChart("symbolline.png")